It is thought that the MBL phase of such systems can be described in terms of emergent LIOMs which form a complete set of quasilocal conserved quantities [1]}, [2]}, [3]}. In the absence of interaction, such a system exhibits Anderson localization [4]} for an arbitrarily small amount of disorder. The corresponding single-particle wavefunctions are exponentially localized in real space over a characteristic length scale which is called localization length.
In this case, a complete set of LIOMs can be identified by the occupancies of these single-particle orbitals [3]}.
Upon turning the interaction on, multiparticle resonances start to proliferate and, hence, a stronger disorder is needed to keep the system localized [6]}.
However, if the disorder strength is sufficiently larger than the interaction strength,
the system remains in the MBL phase and LIOMs can be understood as weakly dressed single-particle orbitals [3]}, [8]}.
